It's because of Avagadro's number.
- It is known as Avagadro's constant too.
- It states that at constant temperature one mole of any substance contain same number of atoms i.e n no of atoms
where

I THINK 18 OR 21 I AM SORRY IF I AM WRONG BRO
pressure......................................
Answer:
uh no I guess because your not your parents property your their child
Answer:
D
Explanation:
Because do all of that and then you do a conclusion